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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 2059 | * |
| 2060 | * @since 2.8.1 |
| 2061 | * @since 4.4.0 Added support for `min-height`, `max-height`, `min-width`, and `max-width`. |
| 2062 | * @since 4.6.0 Added support for `list-style-type`. |
| 2063 | * @since 5.0.0 Added support for `background-image`. |
| 2064 | * @since 5.1.0 Added support for `text-transform`. |
| 2065 | * |
| 2066 | * @param string[] $attr Array of allowed CSS attributes. |
| 2067 | */ |
| 2068 | $allowed_attr = apply_filters( |
| 2069 | 'safe_style_css', |
| 2070 | array( |
| 2071 | 'background', |
| 2072 | 'background-color', |
| 2073 | 'background-image', |
| 2074 | |
| 2075 | 'border', |
| 2076 | 'border-width', |
| 2077 | 'border-color', |